whl-035 Rev. 002 Rel. 002 Date 11.1.17
11
Figure 6 - Dual Element Model Wiring Detail, Non-Simultaneous
Element Operation - Green Wire for Grounding the Water Heater
Part 5 - Installation Checklist
Water Heater Location
Yes
No
Close to area of heated water demand
Indoors and protected from freezing
temperatures
Area free of flammable vapors
Provisions made to protect area from water
damage and control thermal expansion
Sufficient room to service heater
Relief Valve
Yes
No
Temperature and Pressure Relief Valve prop-
erly installed and discharge line run to open
drain
Discharge line protected from freezing
Wiring
Yes
No
Power supply voltage agrees with water heater
rating plate
Branch circuit wire and fusing or circuit
breaker of proper size
Electrical connections tight and unit properly
grounded
Water Supply
Yes
No
Water heater completely filled with water
BEFORE operating the unit
Air purged from water heater and piping
Water connections tight and free of leaks
Table 4 - Installation Checklist
Part 6 - Operation
Tank must be full of water before the power is turned on. Heating
elements will be damaged if energized for even a short time while
tank is dry. Failures due to “dry-firing” ARE NOT covered by warranty.
A. Combination Thermostat and High Limit Control (ECO)
After water and electrical connections have been made and tank is
filled with water, turn on power to the heater. The heater is now in
operation.
Each water heater is equipped with a combination Thermostat -
High Limit Control (ECO). Thermostats are located above the heating
elements. If for any reason the water temperature becomes excessively
high, the ECO breaks the circuit to the heating element. Once the
switch opens it must be reset manually. However, THE CAUSE OF THE
OVER TEMPERATURE CONDITION MUST BE CORRECTED FIRST.
The cause of the high temperature condition must be investigated
by a qualified service technician and corrective action must be taken
BEFORE placing the water heater back in service. Failure to do so
could result in property damage, severe personal injury, or death.
B. Thermostat Adjustment and ECO Reset
There are two thermostats on dual element heaters. If temperature
adjustment is necessary, TURN OFF POWER TO HEATER, remove black
access cover and insulation. The thermostat protective cover SHOULD
NOT be removed. Set temperature indicator to desired temperature.
